Ed Klein, Publisher Split Ahead of Upcoming Obama-Clinton Book

HarperCollins and author Ed Klein have split in advance of his upcoming book, "Blood Feud," which is supposed to make the case for a "deep rivalry" between the Clintons and the Obamas, BuzzFeed reported.

Two sources told the website that the publishing house had issues with Klein's reporting, which is why HarperCollins decided to terminate the contract. Concerns grew while the manuscript was going through the standard legal vetting process in the last couple of months, BuzzFeed said.

"Blood Feud" will now be published by Regnery Publishing Inc., according to Klein's agent and new publisher, who both said it was Klein's decision to leave HarperCollins's William Morrow imprint.

"It was Ed's decision to leave Harper, not the other way around," Regnery President Marji Ross told BuzzFeed. "Harper/Morrow did not request to 'cancel' it. Ed requested to be released."

Ross said the decision was made in the last 10 days, and Klein signed with Regnery last week.

Ross told BuzzFeed that Regnery is "very excited to be publishing Ed's next book," adding that it is "very well sourced and well documented."

The Regnery president said she had read the manuscript, and it will "definitely make news" when it is released on June 23.

Klein, who spent time as the editor of The New York Times Magazine from 1977 to 1987 and also worked as an editor for Newsweek, has written other books critical of Bill and Hillary Clinton and President Barack Obama.

His most recent book, "The Amateur," about Obama's first term in office, was released during the 2012 presidential election. It was also published by Regnery, and stayed at the top of The New York Times best-seller list for six weeks.

Following the release of that book, Klein made a two-book deal with HarperCollins. One was supposed to reveal the "networks of power and influence that control the left-wing political agenda." The other was supposed to cover the next Democratic presidential nominee.

Regnery made the announcement that it would be publishing "Blood Feud" Monday in Publisher's Weekly.

Klein's book on former Secretary of State Hillary Clinton, "The Truth About Hillary," published in 2005, was widely criticized by both liberal and conservative writers.